The 2,462-meter Mayon volcano, located about 340 km southeast of Manila in
Albay province, Philippines, is famous for its near-perfect conical
shape despite dozens of eruptions in the past 300 years. Mayons
last major eruption was in 1993, when 70 people died and more than
50,000 people were evacuated. These two nighttime thermal infrared images
were captured by the Advanced Spaceborne
Thermal Emission and Reflection Radiometer (ASTER), flying aboard NASA's Terra spacecraft, on April 1 and May 20, 2001. Each image has a spatial resolution of 90 meters per pixel.

The April image shows the cone with a small hot spot (white) on the summit. The May image was taken during a period of more intense activity, and shows a large hot
spot where a lava dome has formed, and a possible lava flow on the southeast
side.